Charge Mate Pro 40

The Charge Mate Pro 40 is a current-limited electronic charge relay that distributes charger or alternator current between two battery banks, such as a starter and a service battery. It connects both batteries during charging and isolates them when discharging, reducing the risk of a flat starter battery. This version is intended for systems with an AGM or gel starter battery.

Key features

• Charges two battery banks from a single source
• Electronic (MOSFET) charge coupling with very low voltage drop (max 0.2 V)
• Charge current to the secondary battery limited to 40 A, so the primary battery is charged with priority
• Unidirectional: blocks return current under all circumstances, even when the secondary battery has a higher voltage
• Prevents power dips in the onboard electrical network
• Suitable for all kinds of chargers and alternators
• Optional bypass switch for emergency start assist
• LED status and warning indication
• IP65 electronics in a corrosion-resistant casing with aluminium heat sinks

Technical data

• Battery types: AGM/gel starter batteries charging AGM, gel or lithium service batteries (lithium starter battery applications use the Lithium version)
• Battery voltage: automatic 12/24 V detection; input range 9–32 V
• Output current: limited to 40 A
• Switch-on voltage: 13.5 V (12 V) / 27 V (24 V) (5 s delay)
• Switch-off voltage: 12.75 V (12 V) / 25.5 V (24 V) (2.5 s delay)
• Remote switch functions: on, off, auto, start assist (3 fast-on connectors for switch, ground and status LED)
• Parallel configuration: yes
• Power consumption: < 1 mA at 12/24 V DC (switch open)
• Temperature range: -40 °C to 60 °C
• Protection degree: IP65
• Dimensions (h x w x d): 157 x 140 x 80 mm (6.2 x 5.5 x 3.1 in)
• Weight: 0.88 kg (1.9 lb)
• Compliance: CE

Applications

Leisure and professional marine and mobile installations needing prioritised or current-limited charging, for example connecting a bow thruster battery to the service battery: the service battery is charged first, return current from the thruster battery is blocked, and current limiting avoids network power dips.